Half the for loops in a typical Java codebase exist just to count from one number to another. A Groovy range collapses that ceremony into two dots: 0..9 gives you a countable, iterable sequence you can loop over, slice lists with, or match in a switch. This guide covers numeric, character, and reverse ranges with examples tested on Groovy 5.0.6. “A range is the simplest way to express a sequence. If you can count it, Groovy can range it.” Last ... Read More

Work through Groovy arrays with 12 practical examples. Create, access, sort, and convert arrays. Complete guide tested on Groovy 5.0.6. “Arrays are the backbone of every programming language. Once you understand how Groovy handles them, you’ll realize how much Java boilerplate you’ve been writing for nothing.” Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 20 minutes Arrays in Java are fixed-size, type-safe containers – and in Groovy they keep ... Read More

Groovy set provides built-in support, shown here with 10 examples. Create unique collections, perform set operations like union and intersection. Tested on Groovy 5.0.6. “A set is a Many that allows itself to be thought of as a One.” – Georg Cantor Last Updated: July 2026 | Tested on: Groovy 5.0.6, Java 17+ | Difficulty: Beginner to Intermediate | Reading Time: 16 minutes If you’ve been calling .unique() on a Groovy List to remove duplicates, you already understand why sets ... Read More